Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 47 for “"NS-2"”.
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Performance evaluation of routing protocols using NS-2 and realistic traces on driving simulator
… as a promising method to effectively solve transportation-related issues. So far, most of researches on VANETs have been conducted with simulations as the real-world experiment is expensive. A core problem affecting the fidelity of simulation is the mobility model employed. In this thesis, a …
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NS-3 Simulation of WiMAX Networks
… available. One that is growing in popularity is NS-3, the successor to the popular NS-2. It is a significant departure from NS-2, and offers many advantages and disadvantages. In this thesis, we translate and update a sophisticated WiMAX simulation model from NS-2 to NS-3, and use this experience …
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Routing and Transport Layer Protocols for Wireless Networks
We study the performance limitations of TCP's (Transmission Control Protocol) congestion control mechanism on Wide Area Wireless Networks (WWANs) and also on ad hoc networks. We identify the properties of typical WWANs based on studies on the CDPD (Cellular Digital Packet Data) network, simulate …
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Network Simulation Cradle
… proposes the use of real world network stacks instead of protocol abstractions in a network simulator, bringing the actual code used in computer systems inside the simulator and allowing for greater simulation accuracy. Specifically, a framework called the Network Simulation Cradle is created …
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Rate selection for MIMO links
… take advantage of multiple antennas at the transmitters and receivers, as well as multipath propagation, to provide more reliable, higher capacity wireless links. As a result, these links can support a set of much higher data rates than single-input single-output (SISO) links. However, it is …
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A comprehensive study of distributed denial of service attack with the detection techniques
… for the success of certain types of organizations, some sustained simplification of services is essential. However, these service area units were usually hindered by the constant threat from numerous kinds of attacks. One such attack is called a distributed denial of service attack and leads to …
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Congestion Control Protocols for the Evolving Internet
… priority TCP variant is called Competitive and Considerate Congestion Control (4CP). 4CP enables provisioning of per-flow average bandwidth guarantees and thus some quality of service to ""normal"" traffic (TCP flows), but not at the expense of potentially starving the ""low"" priority traffic …
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Reliable Multicast in Mobile Ad Hoc Wireless Networks
A mobile wireless ad hoc network (MANET) consists of a group of mobile nodes communicating wirelessly with no fixed infrastructure. Each node acts as source or receiver, and all play a role in path discovery and packet routing. MANETs are growing in popularity due to multiple usage models, ease of …
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Bandwidth broker for advance resource reservation in diffserv networks
… Services networks. Unlike traditional BB designs, which limit reservations to within a single administrative domain and for immediate usage, this work supports inter-domain negotiation and advance reservation efficiently through the Simple Inter-domain Bandwidth Broker Signaling eXtended …
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Creating subchannels to improve throughput in wireless communication
… to be used more efficiently. Large throughput gains are possible, even with different mixes of traffic patterns. The effect of different guard bands was studied using the USRP and GNU Radio. Two daughterboards were used for each USRP so that two channels were used for transmission. The two …
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Design and evaluation of AMPER : a probabilistic routing protocol for mobile ad hoc networks
… from source to destination, which introduces considerable latency for recovery from a link failure along this path. Finally, they often use the minimum hop count as a basis for routing, which does not always guarantee a high throughput. This thesis presents AMPER (Ad hoc, Modular, Probabilistic, …
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Handover Performance in the Mobile WiMAX Netrworks
… technologies of handovers for previous generations are introduced in detail. Further, the hard handover of the mobile WiMAX is simulated by Network Simulator-2 (NS-2). In addition, the "ping-pang" effect of handover was investigated and the call blocking and dropping probabilities are implemented …
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Creating Models Of Internet Background Traffic Suitable For Use In Evaluating Network Intrusion Detection Systems
… realistic Internet background traffic and demonstrates how the models are used both in a simulation environment and in a lab environment. Part two introduces two different NID (Network Intrusion Detection) techniques and evaluates them using the modeled background traffic. To demonstrate the …
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Securing Data Dissemination in Vehicular ad hoc Networks
… damaging, particularly in military applications where controlling the dissemination of messages is essential. This thesis therefore provides a review of the issue of security in VANET and MANET; it also surveys existing solutions for dissemination control. It highlights a particular area not …
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The influence of transmission range on the performance of Vehicular AD-HOC Network (VANET)
… Communication (DSRC) among vehicles (V2V) by consolidating existing technologies in which each vehicle is considered as a node. This type of communication is part of an Intelligent Transportation System (ITS) application. Importantly, there is still no comprehensive evaluation which portrays the …
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Redefining the hardware-software boundary in networked systems
… developers to create complex software applications with limited knowledge of the underlying hardware, it has led to an inflexible boundary between the division of labor in hardware and software. This abstraction has been necessary to allow developers to create innovative and complex software …
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Network Management Game
… Providers (ISPs). Since wrong configurations might lead to an enormous amount of customer traffic to be lost, highly experienced network administrators are typically the ones who are trusted for the management and configuration of a running ISP network. We frame the management and …
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Design and performance evaluation of multicast congestion control for the internet
… not easy to provide an MR-MCC design with responsiveness, efficiency of network utilisation, low packet loss, scalability and fairness (including inter-protocol fairness, intra-protocol fairness, intra-session fairness and TCP-friendliness) as well as feasible implementation. This thesis is …
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Joint radio resource management in heterogeneous wireless networks
… of different access technologies is a considerable technological challenge. Designing a good joint radio resource management (JRRM) scheme for a heterogeneous wireless network is part of the integration challenges. The design goal of a JRRM is optimising the trade-off between resource …
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Noncooperative Games for Control of Networked Systems
… and network intrusion detection and response. In the cases of CDMA power control and congestion control, a fairly general, distributed, market-based resource allocation framework is developed and analyzed. The applicability of the underlying noncooperative network game's principles to both …
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